Usps Postage Rates 2024 Large Envelope. Explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and optimize your mailing strategies. See how new and upcoming postage rate changes will affect your shipping, including stamp costs, flat rates, and more.

Priority mail, including priority mail flat rate shipping products, has fast shipping times (1, 2, or 3 business days) with flexible prices. Postage rates for postal services, the most current rates.